| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Architectural Services Group Ltd | 03840622 | 13/09/1999 | Dissolved |
| Diagnostic Health Solutions Dhs Ltd | 06765378 | 03/12/2008 | Dissolved |
| Diagnostic Health Solutions Ltd | 05484956 | 01/06/2008 | Dissolved |
| New Tech Glazing (London) Ltd | 03545350 | 14/04/1998 | Dissolved |
| Qsg North Ltd | 06359365 | 15/02/2008 | Dissolved |
| Qsg South Ltd | 06359529 | 01/03/2008 | Dissolved |
| Quay Qsg Ltd | 06764601 | 03/12/2008 | Dissolved |
| Technical Services (London) Ltd | 03546003 | 15/04/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CAPITA PROPERTY AND INFRASTRUCTURE HOLDINGS LIMITED | 03840627 | 13/09/1999 | 07/04/2000 | Gold |
| DHS DIAGNOSTIC HEALTH SOLUTIONS LIMITED | 06359153 | 01/10/2007 | 11/03/2010 | Dissolved |
| DHS DIAGNOSTIC HEALTH SOLUTIONS LIMITED | 06359153 | 01/06/2008 | 13/11/2009 | Dissolved |
| Education Partners Ltd | 03804738 | 09/07/1999 | 07/04/2000 | Dissolved |
| New Tech Glazing (London) Ltd | 03545350 | 14/04/1998 | 14/04/1998 | Dissolved |
| Quay Education Services Ltd | 04620332 | 18/12/2002 | 01/07/2004 | Dissolved |
| Quay Group Services Ltd | 04620287 | 18/12/2002 | 07/07/2004 | Dissolved |
| Quay Housing Ltd | 04620333 | 18/12/2002 | 07/07/2004 | Dissolved |
| SOCIAL HOUSING (LONDON) LIMITED | 03339333 | 26/03/1999 | 07/04/2000 | Dissolved |
| Social Care Partnership Ltd | 03804812 | 09/07/1999 | 07/04/2000 | Dissolved |